Abstract
We have experimentally excited terahertz multipolar Fano resonances in two asymmetrical metal particles: a defective corrugated metallic disk(CMD) structure and a hybrid structure consisted of a C-shaped resonator and a CMD. Furthermore, the Fano resonance modes can also be excited by the interaction between plasmonic waveguide and CMD. Our findings have shed light into the terahertz multipolar Fano resonances in asymmetrical CMD and opened the way to the design of terahertz plasmonic devices.
Highlights
Terahertz functional components such as polarizers, modulators and filters, are crucial devices for different terahertz applications [1,2,3,4,5,6,7,8,9,10]
We investigate the transmission properties of a hybrid spoof localized surface plasmons (LSPs) structure consisting of one closed corrugated metallic disk (CMD) and one C-shaped resonator structure
Numerical and experimental results reveal that multiple Fano resonances could be excited at terahertz frequencies when the symmetry of CMD is broken by introducing a small angle of defect
Summary
Lin Chen 1, 2, Bo Liu 1, and Yiming Zhu 1*, 2 1 Shanghai Key Lab of Modern Optical System, University of shanghai for Science and Technology, Shanghai, China 2 Cooperative Innovation Centre of Terahertz Science, University of Electronic Science Chengdu, China. Abstract:We have experimentally excited terahertz multipolar Fano resonances in two asymmetrical metal particles: a defective corrugated metallic disk(CMD) structure and a hybrid structure consisted of a C-shaped resonator and a CMD. The Fano resonance modes can be excited by the interaction between plasmonic waveguide and CMD. Our findings have shed light into the terahertz multipolar Fano resonances in asymmetrical CMD and opened the way to the design of terahertz plasmonic devices
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